5.3 \*\*Maintenance\*\*. Lessee agrees that, with respect to the Airframe, the
Engines and each Part, Lessee will, or Lessee will cause such other Person to,
at Lessee’s own expense, (a) maintain, inspect, service, repair, overhaul and
test the same in accordance with Applicable Standards, (b) make any
alterations or modifications that may at any time be required to comply with
Applicable Standards, and to cause the Aircraft to remain airworthy, (c)
furnish all required parts, replacements, mechanisms, devices and servicing so
that the condition and operating efficiency thereof will at all times be no
less than its condition and operating efficiency as and when delivered to
Lessee, ordinary wear and tear from proper use alone excepted, (d) promptly
replace all Parts (i) which become worn out, lost, stolen, taken, destroyed,
damaged beyond repair or permanently rendered or declared unfit for use for
any reason whatsoever, or (ii) if not previously replaced pursuant to clause
(i), as and when required by any Applicable Standards, including any
applicable life limits, (e) maintain (in English) all Records in accordance
with Applicable Standards, (f) enroll and maintain the Aircraft in a
Maintenance Program and the Engines in an Engine Maintenance Program, and, by
doing so, cause the applicable program provider on Lessee’s behalf to fully
and timely comply with the requirements of this Section 5.3 if and to the
extent such requirements are subsumed within such programs (except that,
irrespective as to whether such requirements are so subsumed within such
program or programs, Lessee shall remain primarily responsible for the full
and timely compliance with each such requirement). All maintenance procedures
shall be performed by properly trained, licensed, and certified maintenance